Electrical condenser for mechanical interrupters



I. E. SCHWARZMANN. ELECTRICAL CONDENSER FOR MECHANICAL lNTERRUPTERS.

' FILED her. 24. WW.

Dec. 26, 1922.

zGQQ/AQWM Patented Dec. 26, 1922.

UNITED STATES PATENT OFFICE.

WOLFGANG ERNEST SCHWABZMANN, OF SPRINGFIELD, MASSAQHUSET'IS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO AMERICAN BOSCH MAGNETO CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

ELECTRICAL CONDENSER FOR MECHANICAL INTERRUPTERS.

Application filed October 24, 1918. Serial No. 259,581.

To ail whom it may concern.

Be it known that I, Wow-disc l9. Scrrwanmnmn, a citizen of the United States, resuling at Long Meadow, ttlpringfield, in the county of Hampden, State of hlasichusetts, have invented certain new and useful improvements in Electrical Jl'l denser-s for Mechanical interrupters; and I do hereby declare the following to be a iuil, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to electric condensers for mechanical interrupters and particularly to condensers arranged in the cap of the interrupter.

Hereto fore it has been customary in arrangements of this general kind to use the screws or other fastening devices holding the cap in place on the interrupter to make the electrical connections between the condenser and the interrupter contacts. Thus, the cap cannot be removed from place with the connections to the condenser intact for inspection. So also, connections cannot be made to the interrupter alone so that the interrupter can be used at will with. a spark coil without passing through the generating winding of a magneto with which the interrupter and condenser may be associated.

In accordance with one part of my invention, the condenser in the cap has one terminal permanently grounded, preferably on the cap which may be of metal, and the other terminal detachably connected to the insulated terminal of the generating winding of a magneto or spark coil, so that when the cap is removed from place on the interrupter, the connections to the condenser, as well as the condenser itself, can be inspected.

In accordance with another part of my invention, the insulated terminal of the con denser is connected to an outside binding post on tie cap, and also to the insulated terminal of the generating winding of a magneto, whereas the insulated terminal of the mechanical interrupter is connected to another outside binding post. Thus, when the two binding posts are electrically connected, the interrupter serves for the magneto, and when they are disconnected, the interrupter alone may be connected to a spark coil in battery ignition system.

In the accompanying drawings illustrat ing this preferred construction in applicaion, as an example, to a magneto wherein a plate condenser has an outside connection to a nonnall tationary circuit contact of the interrupter and an inside connection to the primary winding, Fig. 1 is a longitudinal section of a sleeve type of magneto provided with the condenser of my invention; Fig. is an end view of the condenser end f the magneto, partly broken away; Fig. is a section on line 33 of Fig. 4:; Fig. 4 is an enlarged cross section 01 the cap; Fig. 5 is a rear end View of the condenser alone; and Fig. 6 is a wiring diagram.

The magneto has the magnets l, the sleeve 2 rotatable in the bearings 3 and carrying the magneto gear 4 and the distributor pinion 5, and the armature 6 held stationary in. the bearings T by the locking disc 8 and carrying a generating winding comprising the primary turns 9 and the secondary turns 10, The mechanical interrupter is mounted in the housing 11 and comprises the cam 12 mounted on the shaft 13 of the rotatable sleeve, the circuit contacts, comprising the insulated contact 14 and the grounded contact 15, being normally stationary but capable of moving with the housing 11 to advance or retard the spark in the well known way.

The cap 16 is made of metal and fits snugly over a projecting flange of the housing 11 so as to close its interior and form a good electrical connection to the frame of the magneto. In the hollow interior of this cap is arranged the condenser 17 having alternate plates of foil extendin outwardly of the intermediate plates of dielectric on one side of the condenser and having its other alternate plates of foil extending outside of the plates of dielectric on the other side of the condenser, in the well known way. The bent conducting plate 18 fits tightly over one end of the condenser and has a struck up clip 19 perforated at 20 for the passage therethrough of the screw 21 electrically connecting the plate, and therefore the plates of foil extending into contact with it, to the metal cap. A bent conducting plate 22 is clamped tightly around the other side of the condenser in contact with the plates of foil extending outwardly on that side, and it carries a termina123 and. a flange riveted to a member 24; of metal into which is screwed tl'e stud 25 oil a binding post. The roiulucting plate is i; ulated troni the rap by the insulating material 26, and the member 324-. is insulated from the can by the insulating nutterial 2G and the soclret 2i" oi. the binding post.

The conductor extends from the insulated terminal of the primary turns of the generating winding through the hollow shaft of the sleeve to the terminal 23, torining an inside (mnductor between the t ench ating winding and. the insulated term id of the condenser, the member 24; formirw an inside conductor from that terminal or the condenser to the binding post. Tl. he outside conductor 29 connects the binding post with the insulated circuit contact i l oi? the interrupter by way of the metal s .'.p 30 and the binding post 31 (Fig. There is sullicient slach in the conductor 28 to peri'nit the i to be removed from the housing 1.1 so the condenser may be readily exposed for inspection, repair or replacement.

It is apparent from the foregoing descrip tion that the condenser is locat d in a well. protected but accessible position, and, at the same time, may be removed :lroui the interringter by pulling oil? the cap, to inspect the connections to the condensi-u: as well. as the condenser itsel'l. liurtheuiore, by discomiecting the conductor 29 from the hind post 31., the mechanical. interrupter is rely disconnected from the generating winding oi? the magneto and from the (:011 denser, so that a spark coil may be connected to the interrupter alone for operation in battery ignition system. i

Having thus described my invention what i claim is:

1. The combination with a generating winding and a mechanical interrupter hav: iug circuit contacts. a removable cap, means for holding the cap in place, a condenser arranged in the cap and liiaviug one teruiiuai permai'iently grounded. and the other ter-- minal. fastened to the insulated terminal. oi? the g crating winding. whereby, when the cap is removed from the mechanicalv interrupter. the electrical, connections to the rou- .er ren'iaiu intact.

a Qhe' combination with a magnet hav in generating windin and a l Q 3lH|ii 3 interrupter having circut contacts, a liundrost connected. to the insulated circuit wearer post on. said cap, a conductor electrically connecting said binding posts, a condenser arranged within said cap, terminals on said condenser, a couiiluctor connecting the iusulated terminal oi? the generating winding to the insulated terminal of: the condenser, the binding postof said cap being connected. to said insulated terminal, and a grounded conductor connected to the other terminal of said. condenser, whereby when the two binding posts are disconnected the inter rupter is disconnected from the generating winding and the condenser.

3. The combination with a generator znd. an interrupter, a removable cap on said. interrupter, a condenser in said cap, cond c ting plates connected to the ends of said condenser, one of said plates being connected to said cap and grounded therethrough, the other of said plates being insulated from said car), and detachable conductors leading from said latter plate to said, nerator and said interrupter. the conductor leading to said generator being oi. suiiicient length. whereby when the cap and condenser are removed. "from the inter upter for inspection of said condenser the electrical connection of said conductors to said condenser remains intact.

-.l'. In an electrical gei'ierator, the combination. with a stationary winding and a sha'lt, ol a mechanical. interrupter and. a re movable cap therefor, a. conrleuser in said cap and. having a grounded terminal and an insulated terminz'd, a conductor connecting said winding to said insulated terminal ano. extending through said shaft, whereby, when said cap and condenser are moved from said. interrupter, the electrical connections to said condenser remain intact.

5. In an. electrical generator, the combii'iation with a stationary winding'and a shaft. of a mechanical interrupte' and a removable metal cap therei'or. a. condenser in said cap and having one tern'iinal permae nently grounded. to said cap and the other terminal insulated from said cap, an insulated conductor connecting said Winding to said insulated terminal and extending through said. shatt, whereby. when said cap and condenser are rei'uoved E'rom sa d interrur le-r. the electr cal cininc 'rtioils to said volt. denser rcma i n intact.

in testimony whereojl l1 atlir; my signature. 

